Registration Mystery – how to use username instead of First/Last?

I test-registered 10 fake users. Somehow I managed to create one user with no First and Last name. All I see is the username.

My question is, how do I duplicate this?? This is actually good, since I’m migrating over a message board community that is more comfortable with using their username “handles” rather than real-life identities.

Second question: is it possible for users to specify whether they want to use their username or First/Last?

If you just want it to be optional you can simply modify the code detailed above to make First and Last name optional instead of required or just delete that code as I said then add new fields from the admin for first name and last name.

For my site, I removed the code above then made a new field simply called “Name” that was option so users could share their name if they wanted to, but their username is still used around the site.